A 0.5 V tunable complex filter for Bluetooth and Zigbee using OTAs

Authors:
Richa Arya;George Souliotis;Spyros Vlassis;Costas Psychalinos
Affiliations:
Department of Physics, University of Patras, Patras, Greece;Department of Physics, University of Patras, Patras, Greece;Department of Physics, University of Patras, Patras, Greece;Department of Physics, University of Patras, Patras, Greece
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2014

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RF microelectronics

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Analog Integrated Circuits and Signal Processing

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Abstract

A 12th-order low voltage tunable differential complex filter for bluetooth and Zigbee applications is proposed in this paper. The filter is based on improved controllable transconductors operating with the ultra-low supply voltage of 0.5 V. Simulation results using a triple-well 0.13 μm CMOS technology verify the filter operation fulfilling all the requirements for the complex filtering stage in bluetooth or Zigbee receivers. The in-band group delay variation is 0.79 μs for bluetooth and 0.46 μs for Zigbee. The image rejection ratio is greater than 71 dB and the achieved in-band spurious free dynamic range is 42 dB.